Improvement in wood-pulp machines



UNITED STATEs PATENT OEEIoE.

WILLIAM M. HowLAND, oE'ToPsHAM, MAINE.

`IMPROVEMENT IN WOOD-PULP MACHINES.

Specification forming part of Letters Patent N0. 113,297, dated April 4, 1871.

t To all 'whom it may concern."

' being had to the accompanying drawing, and

Yto the letters of referencemarlied thereon.

This invention relates to an improvement in a machine for automatically raising` the weights from the blocks of wood in a woodpulp-grinding machine of the general form and arrangement of stone known as the Taft machine,77 for grinding wood-pulp 5 and the nature of this invention consists in the construction` and arrangement of parts hereinafter more fully set forth and specified.

In the drawing, Figure 1 represents a section of the machine with all its parts in place, the section being taken vertically through the center of the machine, and showing two of the automatically acting pulleys. Fig. 2 is a transverse section of the cog-wheel, with its shaft-pin I) and pulley in place. Fig. 3 shows the oscillating bearing carrying the bevel-pinion on its proper shaft, the arm, latch, and spring. Fig. .lis the same in another position; and Fig. 5 is a top view of the bearing or carriage for the shaft of the bevel-wheel, showing the worm-gear.

The position of the stone is shown at N. revolving horizontally. Over its upper surface are suitable boxes for the reception of the blocks and weights fitted to slide therein, these weights being held in position by arms a a, or in anysuitable manner, which slide on guide-rods on the iXed central shaft, in the manner shown. To all this I lay no claim, my invention being the improvements now to be described for raising these weights.

On the central shaft, P, I place a sleeve, resting below on a suitable bearing, and on its upper end carrying a wheel tte'd to receive motion from a band, or in any of the usual modes. This sleeve carries two bevel-gears, b b', arranged as shown, with the bevels facing inward. Around this central shaft and its bevel gears I arrange suitable supports c c, only two of which are shown, but of Which any convenient nnmber maybe used,

corresponding to the number of the boxes. These supports are divided on their lower ends, the two arms inclosing the oscillating block shown in Fig. 5, the trunnions d d of which have bearings in the arms. Between these arms, also, and underneath the oscillating block or carriage, is the cog-wheel andk drum or pulley.' `This is shown in Fig. 1, the section being between the arms, leaving a view, in elevation, of the' wheel, carriage or block, worm-pin, &c.

The pinion e is made slightly less in diameter than the space between the bevel-gears, and has its bearings arranged in the oscillating carriage, as shown in Fig. 5, to bring the worm which is fixed in its shaft in the open space of the carriage. This worm is in gear with the cog-wheel.

The carriage is pivoted a little below the line of the bearings of the shaft which carries the worm, so that as the carriage tips to throw the pinion in and out of gear wit-h the bevelwheels the worm shall still remain in gear with the wheel below. This carriagehas also an arm, r, projectin g downward, and arranged to be struck by the pin f on the wheel or its attached drum. On the end of the carriage is a handle, h, by which it may be tipped. The carriage has also a spring, t', ixed vertically thereto, and .held between two pins, or in other suitable manner, on the support. This spring is so arranged as to hold the carriage horizontal and the pinion out of gear, and at the saine time to return the carriage to this position after it has been tipped in either direction. This is shown more clearly in Fig. 3. This ligure also shows the latch k, which is pivoted to the support, one end projecting, so that it may be moved by hand, and the other passing over a horizontal pin in the downwardprojecting arm of the carriage. This latch has two notches so arranged in its under edge that when the carriage is tipped down to bring the pinion into gear with the lower wheel, the pin shall fall into the outer notch. When in gear with the upper, this pin shall be in the inner notch. When out of gear with both, the carriage is held by the spring, the pin being between the notches. This downwardproject ing arm of the carriage is marked Z, Fig. 3. It is pivoted at l.

The pin which holds the latch is shown at i m, and the latch resting on it at n. The arrangement is such that the pin f on the cogthe handle, Vinto gear with the upperwheel.Y

This, through the worm-screw, tur/ns the cogwheel and drum or pulley attached thereto,

fwinds up the chain, and lifts the weight. The

size of the drum being proportioned to the dis- .tance which the weight is to be raised, the pin f on the drum strilres and raises first the latch and then the downward-projecting arm of the carriage, and, by tipping this, moves the pinion out of gear with the Vupper wheel. The

spring holds the carriage horizontal, and the y whole movement stops.

To reverse it, the carriage is to be tipped in the opposite direction, and the pinion thrown `into gear below, the stop operating on latch and arm in the same manner as before, thus leaving the rope or chain loose and the weight to sink as the block is ground away.

Having thus fully described my invention, what I'claim as new, and desire to secure 'by Letters Patent, is-

l. The bevel-wheels arranged on the sleeve and shaft, in combination with the pinions and suitable intermediate devices for raising the weights, as set forth.

2. In combination with the pinion and bevelwheels, the shaft, with its worm-screw, cogwheel, and drum o, pulley, and chain, all as described.

3. The tipping-carriage, carrying the shaft of the pinion andjvorm, and operatinggin con@ 7 Y nection with the other parts, as set forth.

4. The downward-projecting arm of the carriage, in combination with the pin f, as shown and described.

5. In combination with the arm of the carriage and the pin j', the latch.

G. The spring, combined with the carriage, and operating in connection with other parts, as set forth.

This specification signed and witnessed this 13th day of February, 1871.

WILLIAM M. HOWLAND.

Witnesses:

GHAs. W. WILsoN, JOHN KNIGHT. 

